Two separate news items are present in this cluster, one concerning a new music notation system and the other about Martin Shkreli potentially violating a trading ban. The first item introduces XY Music Notation, an isomorphic music keyboard system using base-12 notation for sheet music. The second item reports that the Federal Trade Commission alleges Martin Shkreli has been trading pharmaceutical stocks, which would violate his lifetime ban. AI
RANK_REASON The cluster contains two unrelated items, one about a niche music notation system and another about a legal issue for a public figure, neither of which meets the criteria for other buckets.
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